After making quite a mess of the last Bimmer i had on a 12 car. I've now bought myself anE36 compact TI. Not going to go down the road rally route but might do the odd drift day Autosolo Gymhana with it. What would be the best Diff to put in it ratio LSD etc? Any help much appreciated.Apologies if this is in the wrong section.

I use a z3 auto diff, 4.4 ratio with lsd and replaced bmw plates with ford escort (english) plates for more bite. then forget about using 1st gear , the ratios are similar to a rocket gearbox (I have a M42)